Primary design of an 8 mm fundamental wave gyro traveling wave tube amplifier

An 8 mm fundamental wave gyro traveling wave tube is studied. By the analysis of stability, the parameters are determined. Employing a PIC code, the interaction between electron beam and wave is simulated and discussed in detail, and the primary design is presented. The results indicate that an over 450 kW output power and 50 dB gain are obtained from amplifier under the optimum condition. The efficiency exceeds 22.5% and the 3 dB bandwidth is about 5%.